html,body{
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: none;
  box-sizing: border-box;
  --menu-height: 50px;
}
body {
  height: 100%;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-family: Helvetica Neue, Helvetica, PingFang SC, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;
}
